Pipe-wrench



J. LEIB. y

' PIPE WRBNGH.

Patented' Dec. 14, 1886.

l No. 354,197.

l the defects shown in a previous patent granted I Vrender the device inoperative.

UNITED STATES PATENT OFFICE.,

JOHN LEIB, OF SANDY RUN, PENNSYLVANIA.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 354,197, dated December 14, 1886.L

Application Iiled November 4, i886. Serial No. 217.988. (No model.) y

T0 all whom t may concern:

Be it known that I, JOHN LEIB, a citizen of the United States, andaresident of Sandy Run, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in PipeWrenches; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or gures of reference marked thereon, which forma part of th-is specification.

Figure l of lthe drawings is a side view of my improved pipe-wrench. Fig. 2 is a perspective view of the dog. Fig. 3 is a sectional view ofthe head of the lever.

My invention relates to pi pe-wrenches; and it consists in the construction and novel combination oi' parts, as hereinafterdescribed,land pointed out in the claim.

The object of this application is to correct tome September 7, 1886, No. 348,751, .in which the pivoted slotted dog is inserted in the slotted head of the lever,with the beveled end directed upwardly, which arrangement would I now vdesire to show and describe the said Adog in proper position with relation to the lever, as hereinafter specified.

Referring by letter to the accompanying drawings, A designates the lever of the pipewrench, which lever is provided'with an integral slotted head, B, the slot() passing through the head B from edge to edge. The head B terminates in a curved tapering point, D, said point D being concave on one edge face and convex on the other edge face, the latter edge face being toothed transversely across the points of the teeth F, projecting tangentially in the direction away from the fulcrunI-point of the dog` G, said dog G being pointed and curved downwardly atits end H. The dog G is provided with an elongated slot, I, through which a bolt, J ,seated in the head B passes, said bolt Jbeing provided Vwith a head at one end land a nut, L, at the other end, for retaining it in place. To the larger or rounded end M of the pivoted slotted dog G is connected one end of a sprocket-chain, N, said chain N being composed of alternate larger links, P, connected by alternate smaller links, Q, said links all being rectangular links in plan view, the ends of the side bars of said links being rounded.

In operation the sprocketchain is passed y over the pipe, and the proper link that will hold the teeth of the lever in contact with the pipe is engaged with the point of the dog. Then by turningthelevcr of the wrench in the direction that will press the points of the teeth against the pipe the chain will operate as asecond jaw, and the pipe may be turned to screw it up,or to unscrew it, as may be desired.

Having described this invention, what I claim, and desire to secure by Letters Patent, Is-

The combination, with the slotted lever having the convex serrated or toothed point, of the sprocketchain provided with the slotted pointed dog at one end, secured in the slotted lever by a bolt, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN LEIB.

Witnesses:

EDWIN PUG II, DANIEL J. KENNEDY. 

